All it takes is 2 or 3 users to be streaming video or to download a game update or to be uploading large files for it to make your Internet connection annoyingly slow and inconsistent.
So I have not heard of that unit before and you should have received three numbers with units, a download speed, an upload speed and a ping. For online gaming with FPS styled games, ideally you want a low ping, something around 5ms but anything less then 50ms should be fine. If you are getting pings of 100ms or higher you will experience lag.
So the internet in my accommodation is pretty bad, can’t run some games at all because of it. Tried buying an Ethernet cable for my laptop and run it off that still nothing. Any other suggestions please? Just want to try and play Cod and have a stable connection.
Your best bet is to contact the IT department, tell them which game(s) don't work, and see what they suggest.